This was very challenging! The movement felt a little to slippery to me, I wish the player stopped and started a little faster - but I also don't play many platform games, so maybe this feels great to a more seasoned player!
It sounded like there was a different song for each level, which was a nice touch.
Were the levels designed with a particular solution in mind? Or is the expectation that the player should be able to get around all possible combinations of spikes and platforms?